Method of handling glass sheets.



O. B. OARNAHAN. METHOD OF HANDLING GLASS SHEETS APPLICATION FILED MAY 6,1913.

Patented Jan. 19, 1915.

2 SHEETSSHEET 1.

INVEN RJR 7 Lu NMMQ WWNESSES G GL ASS SHEETS.

METHOD OF HANDLH APPLICATION FILED MAY 6. 1913.

Patented Jan. 19, 1915.

2 SHBETS$HEET Z.

. INVENTOR WiTNE-ISSES ORLANDO BARTON C'ZXIRNAHAN, OF NEW EAGLE,PENNSYLVANIA, ASSIGNOB WINDOW GLASS MACHINE COTJZPANY. F PITTSBURGH.PENNSYLVANIA, A COR PORATION O}? NEXV JERSEY.

METHOD OF HANDLING GLASS S HEEI'S.

1,125.,aes.

Application filed May 8, 1913.

' To all 11-71 am it in my concern 'Be it known that 1 ()nmxno B. Canna-HAN, a citizen of the United States, residing at New Eagle, Washingtoncounty, Pennsylvania, have invented a new and useful Improvement inMethods of Handling Glass Sheets, of which the following is a full,clear,

and exact description, reference being had to the accompanying drawings,forming part of this specification, in which Figure 1 is a horizontalsection of a portion of a glass flattening and annealing furnace showingmy invention applied thereto; Fig. 2- is a perspective view illustratingthe o eration of my inventiom'and Fig. 3 is'a pi an riew of theauxiliary piling fork.

My invention has relation to improvements in the manufacture of glass,and more particularly to a novel method of removing glass sheets fromflattening: tables or stones and transferring themto the lehr rods of alehr.

In the manufacture of glass sheets, 1n which the lass is'first drawn incylinder form and t 10 cylinders are then split and flattened intosheets, the work of flattening is done on a table within one end of acombined flattening andannealing furnace; and after thesheets have beenflattened they are transferred to the lehr rods, by which they arecarried through the annealing or lehr chamber of. the furnace.Heretofore, considerable diiliculty has been experienced in removing'thoflattened glass sheets from the flattening table. These sheets becomemore or lesssolitened by the heatof the furnace and tend to adhere tothe tables. T his work is usually done by moans oi a fork, which isforced between the flattening stone and the sheet of glass and by whichthe sheet when it is loosened transferred onto the Forksof this kind arekno'srn in the art as piling forks. The me of these forks in-this mannerhas resulted in a very considerable ion of glass due to th dillicnlty offorcing forks iunlerneath the s sheets and the endency to scratch orotherwise ingure the glass during this operation. This has required theuse of skilled labor for this purpose, and even with highly skillediahor a very considerable percentage, of loss is inevitable.

, My invention provides a method of sim-' pl and effective characterwhereby this Specification of Letters Patent.

which the glass cylinders A to be fiat.

- and willleare the hands of-thc operator free .The main fork isoperated on said her,

Serial No. 755,735;-

culty is avoided and the percentage of loss is Mary largo reduced.

'l'he natarunderstood in reference to the accompanying drawing. in whichI have shown a 'pre-' hates the flattening oven, and'3 a ,"zufftiflfl ofthe lehr chamber of a combined flatteningand' annealing furnace. 4 isthe usuai romy table carrying a plurality of flattening stones 5. '6designatesan opening thTOiQfb ed areymoted into the flattening chamber.7 designates an opening opposite the rear end or tn'e lehr chamber 3 andthrough which the workman manipulates theforks for transferring theflattened sheets (one of which is indicated at B) from the flatteningstones to the iehr rods 8.- I

In accordance with my invention, inadditionto the .usuai piling fork ,9,having broad fiat prongs adapted to pass underneath the glass sheet andsupport the same, I employ an auxiliary fork 10. This fork hasrelatively small sharp-ended prongs. I preferably build a frame 11 intothe open ing 7 and provide the bottom bar of this frame with a raisedcrossbar 12, which mav he used as a fulcrum for the forli'fi. vi

The method. of operation is foliows3- The operator first introduces theextreme ends of theprongs of the auxiliary fork. 10 'underneatl'i theedge of the sheet. This can be readily done as the points oflthe prongs-By' a pry-- are relatively small and shar ing fiC'tlLn he then raisesthe sneet-to a positi n substantially such as that shown in Fig. 2, andthen permits the handle of the fork 1G to rest on a suitable supportPreferably the weight of the handie of this auxiliary crisis such thatwhen it is iowerec onto this rest in the mannenshown in Fig. it will:n'ercome the weight of the sheet to operate the main fork 9. The an P 310th 15 operates underneath the cross it ass fulcrum, and owing' to therais gular position of the sheet B this moi.

in the manner shown, without in an way scratching or in uring the sheet.Tire 011,-

n of my invention will be best.

ion

. ioa can be readily inserted underneath the sheet.

gagcmcnt with the sheet of the auxiliary limited to the extreme edgeportion ther Jf, which. is trimmed or cut oil in finishing the sheet, sothat any scratching which may occur-at this edge is wholly immaterial.The prongs on the auxiliary fork 10 are preferahly farenough'apart topermit the main fork e a) work between them. Forks of other kinds ortools other than forks may be enqiloyed in carrying out my process.

The advantages of my invention will be apparent to those skilled in theart, since it provides a simple method whereby scratching of the isalmost entirely eliminated without any material increase in the expenseof operation. Furthermore, my invention does away with. the necessityfor hi -lily shilied labor. and a boy or other unskilled attendant canhe taught to manipulate the forks in a vcr' short time. What 1 claim is:

l... T he herein. described method of removing glass-s sheets iremflattening tables or stones, which ctnsistsin first introducing a pryingtool under one edge portion only of the sheet and engaging the sheet atsepa rated points, prying the sheet loose from the stone and upwardlyinto angular position with said tool, and then introducing lifting meansunderneath the sheet while still supported on the prying tool andbetween its points of support thereon, substantially as described.

The herein described method of re moving glass sheets from flatteningtables, which ccnsists in introducing an auxiliary fork underneath theextreme edge portion only of the sheet, and prying the sheet from thetable and upwardly into an angular position, andthen introducing a mainfork underneath the sheet; substantially as described.

In testimony whereof, I have hereunto set my hand.

- ORLANDO BARTON CARNAHAN.

Witnesses:

' OoTAvE JAC MAIN,

' J. C. JOHNSON.

